Technology for crime control includes receiving a voucher identifier for a mobile phone credit voucher purchased under duress by a victim and generating a request for a legal order directing a telecommunication service provider to obtain certain information about use of the voucher. Approval for the legal order is received and the legal order and the voucher identifier are transmitted by a law enforcement agency computer system via a network to a computer system of the telecommunication service provider. A phone number associated with a mobile phone to which a credit associated with the voucher identifier was applied and a recording of a telephone call to or from the phone number are received via the network from the telecommunication service provider computer system and the law enforcement agency computer system performs an automated analysis of the call by a voice recognition process.